In combination with an ADL DC power supply, the pulse generators generate unipolar pulses. The pulse generators work with a fixed frequency of 20 kHz. Thus, with an external signal generator, this frequency can be varied from 1 kHz up to 40 kHz. The pulse generators are equipped with automatic arc suppression. The parameters for trip-level and break-time are automatically adjusted to the specific processes. Programming by the user is not necessary at all. For automatic synchronization, several generators can be connected via control cables. In this case, the pulse generators automatically switch to external synchronization.